There may be a corner of the world where the name J.R.R. Tolkien is unknown, but you would be hard-pressed to find it. Since their publication, The Hobbit and The Lord of the Rings have been published in every major language of the world. And though he single-handedly gave a mythology to the English and was beloved by millions, John Ronald Reuel Tolkien remained refreshingly un...(展开全部)

The original authorised biography, and the only one written by an author who actually met J.R.R. Tolkien, reissued to mark Tolkien’s 125th Anniversary. In more than 40 years since Tolkien’s death in September 1973, millions have read The Hobbit, The Lord of the Rings and The Silmarillion and become fascinated about the very private man behind the books. Born in Bloemfontein in ...(展开全部)

汉弗莱·卡彭特（Humphrey Carpenter，1946-2005），英国著名传记作家、作家和广播员，是J.R.R. 托尔金的授权传记作者。他写下了《J.R.R. 托尔金：一部传记》，并与托尔金的小儿子克里斯托弗·托尔金共同编辑了《托尔金书信集》，还撰写了诸多与托尔金相关的书籍和报刊文章。他的传记著作多以英国文化名人为题材，包括J·R·R·托尔金、W·H·奥登、艾兹拉·庞德、本杰明·布里顿及伊弗林·沃（Evelyn Waugh）等人。

The authorized biography of the creator of Middle-earth. In the decades since his death in September 1973, millions have read THE HOBBIT, THE LORD OF THE RINGS, and THE SILMARILLION and become fascinated about the very private man behind the books. Born in South Africa in January 1892, John Ronald Reuel Tolkien was orphaned in childhood and brought up in near-poverty. He ser...(展开全部)

R in a Nutshell is the best way to learn R, a powerful open source tool for data visualization and statistical computing -- ideal as a replacement for statistical packages costing thousands of dollars. Practical and easy to read, the book provides a thorough overview of the language, along with a reference to the most commonly used features. You'll quickly discover why R has be...(展开全部)

Based on their extensive experience with teaching R and statistics to applied scientists, the authors provide a beginner's guide to R. To avoid the difficulty of teaching R and statistics at the same time, statistical methods are kept to a minimum. The text covers how to download and install R, import and manage data, elementary plotting, an introduction to functions, advanced ...(展开全部)

Based on their extensive experience with teaching R and statistics to applied scientists, the authors provide a beginner's guide to R. To avoid the difficulty of teaching R and statistics at the same time, statistical methods are kept to a minimum. The text covers how to download and install R, import and manage data, elementary plotting, an introduction to functions, advanced ...(展开全部)

R is rapidly becoming the standard for developing statistical software, and R in a Nutshell provides a quick and practical way to learn this increasingly popular open source language and environment. You'll not only learn how to program in R, but also how to find the right user-contributed R packages for statistical modeling, visualization, and bioinformatics.

R is rapidly becoming the standard for developing statistical software, and R in a Nutshell provides a quick and practical way to learn this increasingly popular open source language and environment. You'll not only learn how to program in R, but also how to find the right user-contributed R packages for statistical modeling, visualization, and bioinformatics.

张志涌等编著的《精通MATLAB R2011a》由纸质媒体和电子媒体有机结合而成。纸质媒体便于读者进行系统、全面、长时间连续地阅读，便于随心翻阅、浏览；而电子媒体向读者提供色彩信息和动态交互的软件环境，提供读者实践本书内容所需的各种文件。 《精通MATLAB R2011a》包含MATLAB使用和数学知识的丰富层次。编著本书有四个主要目的：(1)帮助初学者顺利跨入MATLAB大门；(2)全面、多层次、细致而深入地叙述MATLAB中数值、字符串、胞元、构架、逻辑、函数句柄六种重要数据类型的应用规则、相互配用和编程规范；(3)由浅入深地阐述MATLAB三种建模、分析、仿真环境——数值计算、符号计算和Simulink环境的特征和使用要领；(4)以实例讲述MATLAB代表的现代计算能力对传统算法和思维的影响。 全书包含276个算例。所有算例的程序都...(展开全部)